Use real view specs.
Test using Markers for Sides instead of lines.
Collapse some redundancy and prep the next spec.
Multi-conflict test case.
Fix the Side tests.
Remember refs in each side, too.
Refactor openPath into a util file.
Use a real editor in SideViewSpec.
Drop markers for the ref banners and separator.
Extract Conflicts from an EditorView.

Retain a reference to the EditorView to be able to do things like pull
lines and coordinates after the fact.
Pull the offset from the Marker.
Get the SideViews to track lines via a Giant Hack.
Reposition *after* you add to the DOM.

It doesn't seem to flicker, and you need the parent for positioning to work
properly.
Apply line styles on display-updated.

... but only after we've received a marker change event.
We only need to test .top here.